Evaluación de dos protocolos de inseminación artificial a tiempo fijo (JATF), progestágenos con PMGS (Folligon, Novormon) y progestágenos con Cipionatode estradiol (ECP) y PMGS. En vacas de doble propósito, en el municipio de Cúcuta, Norte de Santander.

Abstract

When evaluating two fixed time artificial insemination protocols (FTI), progestogens with pmsg (folligon, novormon) and progestogens with oestradiol cypionate (oecp) and pmsg, the study was carried out, in a double purpose bovine system, using (n=60), bovines from crosses with Gyr, Brahman, Holstein, Pardo Suizo and Rojo Sueco, in the farm "EL ALBARICO" in the municipality of Puerto Santander, Norte de Santander, the animals were divided into three groups, the first group called milking group (n=20) which was applied progestogens with pmsg (folligon, novormon), the second group of heifers called withdrawal group (n=20) was applied progestogens with oestradiol cypionate (ecp) and pmsg and a control group (n=20); On day (0) they were implanted with (20) bovine intravaginal devices (D. I.B) and two doses of Estradiol Benzoate were injected intramuscularly to both groups, on day (8) the D.I.B were withdrawn and (1) dose of PGF2α and (1) dose of ECG were applied to both groups, but the group withdrew on the same day was given (1) dose of cm cypionatode estradiol (ecp), on day (9) the milking group was given (1) dose of B. E and the withdrawal group were applied (20) Estrotect® patches, on day (10) the IATF was performed to all the milking group and for the withdrawal group insemination was performed (n=10) and the others (n=10) a dose of GnRH was applied to induce ovulation. The percentage of pregnancy of the two groups that implemented the protocols was 45% while the % of pregnancy of the natural mating for the milking group is 25%, for the withdrawal group is 15% and for the control group was 75%. As for the percentage of heifer oestrus detection that used the patch, 55% were detected in oestrus while 45% were not detected in oestrus.